GHRS Calibration Resources
Calibration Product Review for the GHRS
- 09/97
The tables in this document provide a history (as of 1 Jul 1997)
of the differences among the reference images and
tables which were used by the Post Observation Data
Processing System (PODPS) to calibrate GHRS data.
This document can be used to fill in information that the Starview
GHRS Reference file screen may not be able to provide.
Redetermination of Sensitivity for Grating G140L
- Jun 97
We recently updated the archive with a new G140L baseline
post-COSTAR sensitivity file (and accompanying wavelength net file) and
also time-variable sensitivity files. The
Reference File Additions
page has been updated to reflect the additional files available.
Implementation of a Background Count Rate Model for the GHRS
- Jun 97
CALHRS has been enhanced to allow users to choose to subtract a
background model rather than observed background. Please read the
Instrument Science Report for more details. The
Reference File
Additions page has been updated to reflect the additional files
available.
Multigroup G140L Flat-field files
- Mar 97
We recently noticed that the first and last points of the
multigroup G140L flat-field files in CDBS (ga41342hz.r1h and
ga41342iz.r1h) are INDEF instead of 1. and thereby cause a slight
problem when used to calibrate one's data. New files
(h3e1400fz.r1h and h3e1400gz.r1h)
have been put into CDBS to correct the problem.
Photocathode Granularity Maps for G140L
- 10/96
Flat field files
for use with GHRS G140L data are now available from the Calibration
Database (CDBS) and the archive. ISR-076 gives details of when it is
appropriate to recalibrate your data with the new flat field files
(photocathode granularity maps). The new files are not intended for
installation into the Routine Science Data Processing (OPUS) pipeline.
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